1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Check expression equivalent to

  1. Feb 27, 2005 #1
    sec theta - sec theta (sin^2 theta)

    =(1/cos theta) -(1/cos theta)(sin^2 theta)

    sin^2 theta = 1-cos^2 theta

    so after subbing this in I got

    -cos^2 theta/cos theta

    so an equivalent expression would be cos theta?
  2. jcsd
  3. Feb 28, 2005 #2
    Looks fine to me, although where you have -cos^2 θ/cos θ, there shouldn't be a -ve sign.
  4. Feb 28, 2005 #3


    User Avatar
    Science Advisor
    Homework Helper

    You should have factored [itex] \frac{1}{\cos \theta} [/itex] and then it would have more clear...Yes,the final answer is [itex] \cos\theta[/itex].

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Check expression equivalent to
  1. Are these equivalent? (Replies: 5)

  2. Springs - Expressions (Replies: 8)